| abstract |
A novel antibiotic complex designated herein as BBM-1675 complex is produced by fermentation of certain novel strains of Actinomadura verrucosospora. The complex may be separated into two major components, BBM-1675 A 1 and A 2 , and four minor components, BBM-1675 A 3 , A 4 , B 1 and B 2 , and such components exhibit antimicrobial activity and also antitumor activity in certain mouse tumor systems. |